Analytical Methods Approved for Drinking Water 

Monitoring of Organic ContaminantsAnalysis for the following contaminants shall be conducted in accordance with the methods in the following table, or th

The methods and monitoring requirements for these contaminants are specified in 40 CFR 141.24. Additional methods 

of Part 141.The CFR is the legal reference for approved methods and takes precedent over this table. The table should accurately r

information published in 40 CFR 141. If you find discrepancies, please notify The Safe Drinking Water Hotline (800-42table.

Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

1,1,1-Trichloroethane

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

1,1,2-Trichloroethane

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

1,1,2-Trichloroethane

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

1,1-Dichloroethylene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

1,2 Dichlorobenzene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

1,2,4-Trichlorobenzene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

1,2,4-Trichlorobenzene

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

1,2-Dichloroethane

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

1,2-Dichloropropane

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

1,4-Dichlorobenzene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

1,4-Dichlorobenzene

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

2,3,7,8-TCDD (dioxin)

EPA 1613 Tetra- through Octa- Chlorinated 

Dioxins and Furans by Isotope-Dilution HRGC/HRMS

October 1994 EPA/821-B-94-005 PB95-104774 National Technical I

2,4,5-TP (Silvex) Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 

and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).

ASTM International

D5317-93 Annual Book of ASTM Standards, Vol. 

11.02

ASTM International 

ASTM International

D5317-98 (Reapproved 2003)

Annual Book of ASTM Standards, Vol. 11.02

http://www.astm.org

EPA 515.1 Rev 4.0 In Methods for the Determination of 

Organic Compounds in Drinking Water

December 1988, Revised July 1991

EPA/600/4-88-039 PB91-231480 National Technical I

EPA 515.2 Rev 1.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 515.3 Rev 1.0 In Methods for the Determination of 

Organic and Inorganic Compounds in Drinking Water, Volume 1

August 2000 EPA 815-R-00-014 PB2000-106981 http://www.epa.gov/safew

EPA 515.4 Rev 1.0 Determination of Chlorinated Acids in 

Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection

April 2000 EPA/815/B-00/001 http://www.epa.gov/safew

EPA 555 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking Water Supplement II

August 1992 EPA/600/R-92/129 PB92-207703 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

2,4,5-TP (Silvex) Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 

and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).

Standard Methods

6640 B Standard Methods for the Examination 

of Water and Wastewater, 21st Edition

2005 Standard Methods

Standard Methods

6640 B-01 Online version of Standard Methods for 

the Examination of Water and Wastewater. Approval year by Standard Methods Committee is designated by last 2 digits. This is the only online version that is approved.

http://www.standardmetho

2,4-D (as acid, salts and esters) Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 

and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).

ASTM International

D5317-93 Annual Book of ASTM Standards, Vol. 

11.02

ASTM International 

ASTM International

D5317-98 (Reapproved 2003)

Annual Book of ASTM Standards, Vol. 11.02

http://www.astm.org

EPA 515.1 Rev 4.0 In Methods for the Determination of 

Organic Compounds in Drinking Water

December 1988, Revised July 1991

EPA/600/4-88-039 PB91-231480 National Technical I

EPA 515.2 Rev 1.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 515.3 Rev 1.0 In Methods for the Determination of 

Organic and Inorganic Compounds in Drinking Water, Volume 1

August 2000 EPA 815-R-00-014 PB2000-106981 http://www.epa.gov/safew

EPA 515.4 Rev 1.0 Determination of Chlorinated Acids in 

Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection

April 2000 EPA/815/B-00/001 http://www.epa.gov/safew

EPA 555 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking Water Supplement II

August 1992 EPA/600/R-92/129 PB92-207703 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

2,4-D (as acid, salts and esters) Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 

and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).

Standard Methods

6640 B Standard Methods for the Examination 

of Water and Wastewater, 21st Edition

2005 Standard Methods

Standard Methods

6640 B-01 Online version of Standard Methods for 

the Examination of Water and Wastewater. Approval year by Standard Methods Committee is designated by last 2 digits. This is the only online version that is approved.

http://www.standardmetho

Alachlor

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131

Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection 

an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and qua

PB95-261616 http://www.nemi.gov

EPA 507 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131

Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection 

an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and qua

PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131

Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection 

an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and qua

PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Atrazine

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131

Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection 

an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and qua

PB95-261616 http://www.nemi.gov

EPA 507 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131

Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection 

an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and qua

PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131

Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection 

an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and qua

PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Syngenta Crop Protection, Inc.

Syngenta AG625 Atrazine in Drinking Water by Immunoassay February 2001

This method may not be used for the analysis of atrazine in any system where chlorine dioxide is used for drink

from all other systems, any result for atrazine generated by Method AG–625 that is greater than one-half the ma

(in other words, greater than 0.0015mg/L or 1.5 μg/L) must be confirmed using another approved method for thuse additional volume of the original sample collected for compliance monitoring. In instances where a result frconfirmatory testing, the confirmatory result is to be used to determine compliance.

Syngenta Crop Prote

Benzene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Benzene

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Benzo(a)pyrene

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 550 In Methods for the Determination of 

Organic Compounds in Drinking Water Supplement I

July 1990 EPA/600/4-90/020 PB91-146027 http://www.nemi.gov

EPA 550.1 In Methods for the Determination of 

Organic Compounds in Drinking Water Supplement I

July 1990 EPA/600/4-90/020 PB91-146027 http://www.nemi.gov

Carbofuran

EPA 531.1 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 531.2 Rev 1.0 Measurement of N-Methylcarbamoyloximes and N-Methylcarbamates in Water by Direct Aqueous 

Injection HPLC with Post Column Derivatization

September 2001

EPA 815/B/01/002 http://www.epa.gov/safew

Standard Methods

6610 B Standard Methods for the Examination 

of Water and Wastewater, 21st Edition

2005 Standard Methods

Standard Methods Online

6610 B-04 Online version of Standard Methods for 

the Examination of Water and Wastewater. Approval year by Standard Methods Committee is designated by last 2 digits. This is the only online version that is approved.

http://www.standardmetho

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Carbon Tetrachloride

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Chlordane

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Chlorobenzene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Chlorobenzene

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

cis-Dichloroethylene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Dalapon

EPA 515.1 Rev 4.0 In Methods for the Determination of 

Organic Compounds in Drinking Water

December 1988, Revised July 1991

EPA/600/4-88-039 PB91-231480 National Technical I

EPA 515.3 Rev 1.0 In Methods for the Determination of 

Organic and Inorganic Compounds in Drinking Water, Volume 1

August 2000 EPA 815-R-00-014 PB2000-106981 http://www.epa.gov/safew

EPA 515.4 Rev 1.0 Determination of Chlorinated Acids in 

Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection

April 2000 EPA/815/B-00/001 http://www.epa.gov/safew

EPA 552.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking Water Supplement II

August 1992 EPA/600/R-92/129 PB92-207703 http://www.nemi.gov

EPA 552.2 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Dalapon

EPA 552.3 Rev 1.0 Determination of Haloacetic Acids and 

Dalapon in Drinking Water by LiquidLiquid Microextraction, Derivatization, and Gas Chromatography with Electron Capture Detection

July 2003 EPA-815-B-03-002 http://www.epa.gov/safew

EPA 557 Determination of Haloacetic Acids, 

Bromate, and Dalapon in Drinking Water by Ion Chromatography Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS)

September 2009

EPA 815-B-09-012 http://www.epa.gov/safew

Standard Methods

6640 B Standard Methods for the Examination 

of Water and Wastewater, 21st Edition

2005 Standard Methods

Standard Methods

6640 B-01 Online version of Standard Methods for 

the Examination of Water and Wastewater. Approval year by Standard Methods Committee is designated by last 2 digits. This is the only online version that is approved.

http://www.standardmetho

Di(2-ethylhexyl)adipate

EPA 506 Rev 1.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Di(2-ethylhexyl)phthalate

EPA 506 Rev 1.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Dibromochloropropane (DBCP)

EPA 504.1 Rev 1.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Dichloromethane

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Dinoseb Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 

EPA 515.1 Rev 4.0 In Methods for the Determination of 

Organic Compounds in Drinking Water

December 1988, Revised July 1991

EPA/600/4-88-039 PB91-231480 National Technical I

EPA 515.2 Rev 1.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 515.3 Rev 1.0 In Methods for the Determination of 

Organic and Inorganic Compounds in Drinking Water, Volume 1

August 2000 EPA 815-R-00-014 PB2000-106981 http://www.epa.gov/safew

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Dinoseb Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 

EPA 515.4 Rev 1.0 Determination of Chlorinated Acids in 

Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection

April 2000 EPA/815/B-00/001 http://www.epa.gov/safew

EPA 555 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking Water Supplement II

August 1992 EPA/600/R-92/129 PB92-207703 http://www.nemi.gov

Standard Methods

6640 B Standard Methods for the Examination 

of Water and Wastewater, 21st Edition

2005 Standard Methods

Standard Methods

6640 B-01 Online version of Standard Methods for 

the Examination of Water and Wastewater. Approval year by Standard Methods Committee is designated by last 2 digits. This is the only online version that is approved.

http://www.standardmetho

Diquat

EPA 549.2 Rev 1.0 In Methods for the Determination of 

Organic and Inorganic Compounds in Drinking Water, Volume 1

August 2000 EPA 815-R-00-014 PB2000-106981 http://www.epa.gov/nerlc

Endothall

EPA 548.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking Water Supplement II

August 1992 EPA/600/R-92/129 PB92-207703 http://www.nemi.gov

Endrin

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Endrin

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Ethylbenzene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Ethylene dibromide (EDB)

EPA 504.1 Rev 1.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Glyphosate

EPA 547 In Methods for the Determination of 

Organic Compounds in Drinking Water Supplement I

July 1990 EPA/600/4-90/020 PB91-146027 http://www.nemi.gov

Standard Methods

6651 Standard Methods for the Examination 

of Water and Wastewater, 18th Edition

1992 Standard Methods

Standard Methods

6651 Standard Methods for the Examination 

of Water and Wastewater, 19th Edition

1995 Standard Methods

Standard Methods

6651 Standard Methods for the Examination 

of Water and Wastewater, 20th Edition

1998 Standard Methods

Standard Methods

6651B Standard Methods for the Examination 

of Water and Wastewater, 21st Edition

2005 Standard Methods

Standard Methods

6651B-00 Online version of Standard Methods for 

the Examination of Water and Wastewater. Approval year by Standard Methods Committee is designated by last 2 digits. This is the only online version that is approved.

http://www.standardmetho

Heptachlor

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Heptachlor Epoxide

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Hexachlorobenzene

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Hexachlorocyclopentadiene

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Lindane

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Methoxychlor

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Oxamyl

EPA 531.1 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 531.2 Rev 1.0 Measurement of N-Methylcarbamoyloximes and N-Methylcarbamates in Water by Direct Aqueous 

Injection HPLC with Post Column Derivatization

September 2001

EPA 815/B/01/002 http://www.epa.gov/safew

Standard Methods

6610 B Standard Methods for the Examination 

of Water and Wastewater, 21st Edition

2005 Standard Methods

Standard Methods Online

6610 B-04 Online version of Standard Methods for 

the Examination of Water and Wastewater. Approval year by Standard Methods Committee is designated by last 2 digits. This is the only online version that is approved.

http://www.standardmetho

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

PCBs (as Aroclors) PCBs are qualitatively identified as Aroclors and measured for compliance purposes as decachlorobiphenyl. Us

difficulty in achieving the required detection limits than users of Methods 508.1, 525.2 or 508.

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

PCBs (as decachlorobiphenyl) PCBs are qualitatively identified as Aroclors and measured for compliance purposes as decachlorobiphenyl. Us

difficulty in achieving the required detection limits than users of Methods 508.1, 525.2 or 508.

EPA 508A Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking Water

December 1988, Revised July 1991

EPA/600/4-88-039 PB91-231480 http://www.nemi.gov

Pentachlorophenol

ASTM International

D5317-93 Annual Book of ASTM Standards, Vol. 

11.02

ASTM International 

ASTM International

D5317-98 (Reapproved 2003)

Annual Book of ASTM Standards, Vol. 11.02

http://www.astm.org

EPA 515.1 Rev 4.0 In Methods for the Determination of 

Organic Compounds in Drinking Water

December 1988, Revised July 1991

EPA/600/4-88-039 PB91-231480 National Technical I

EPA 515.2 Rev 1.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Pentachlorophenol

EPA 515.3 Rev 1.0 In Methods for the Determination of 

Organic and Inorganic Compounds in Drinking Water, Volume 1

August 2000 EPA 815-R-00-014 PB2000-106981 http://www.epa.gov/safew

EPA 515.4 Rev 1.0 Determination of Chlorinated Acids in 

Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection

April 2000 EPA/815/B-00/001 http://www.epa.gov/safew

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 555 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking Water Supplement II

August 1992 EPA/600/R-92/129 PB92-207703 http://www.nemi.gov

Standard Methods

6640 B Standard Methods for the Examination 

of Water and Wastewater, 21st Edition

2005 Standard Methods

Standard Methods

6640 B-01 Online version of Standard Methods for 

the Examination of Water and Wastewater. Approval year by Standard Methods Committee is designated by last 2 digits. This is the only online version that is approved.

http://www.standardmetho

Picloram Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 

and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).

ASTM International

D5317-93 Annual Book of ASTM Standards, Vol. 

11.02

ASTM International 

ASTM International

D5317-98 (Reapproved 2003)

Annual Book of ASTM Standards, Vol. 11.02

http://www.astm.org

EPA 515.1 Rev 4.0 In Methods for the Determination of 

Organic Compounds in Drinking Water

December 1988, Revised July 1991

EPA/600/4-88-039 PB91-231480 National Technical I

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Picloram Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 

and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).

EPA 515.2 Rev 1.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 515.3 Rev 1.0 In Methods for the Determination of 

Organic and Inorganic Compounds in Drinking Water, Volume 1

August 2000 EPA 815-R-00-014 PB2000-106981 http://www.epa.gov/safew

EPA 515.4 Rev 1.0 Determination of Chlorinated Acids in 

Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection

April 2000 EPA/815/B-00/001 http://www.epa.gov/safew

EPA 555 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking Water Supplement II

August 1992 EPA/600/R-92/129 PB92-207703 http://www.nemi.gov

Standard Methods

6640 B Standard Methods for the Examination 

of Water and Wastewater, 21st Edition

2005 Standard Methods

Standard Methods

6640 B-01 Online version of Standard Methods for 

the Examination of Water and Wastewater. Approval year by Standard Methods Committee is designated by last 2 digits. This is the only online version that is approved.

http://www.standardmetho

Simazine

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131

Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection 

an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and qua

PB95-261616 http://www.nemi.gov

EPA 507 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131

Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection 

an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and qua

PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Simazine

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131

Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection 

an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and qua

PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Styrene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Tetrachloroethylene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Tetrachloroethylene

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Toluene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Toxaphene

EPA 505 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508 Rev 3.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 508.1 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 525.2 Rev 2.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

trans-Dichloroethylene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

trans-Dichloroethylene

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Trichloroethylene

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

EPA 551.1 Rev 1.0 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

Vinyl chloride

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations 
Contaminant

Organization

Method Number Reference Title Date Source of Met

EPA Publication Number

Publication Order Number

Xylenes (total)

EPA 502.2 Rev 2.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.2 Rev 4.1 In Methods for the Determination of 

Organic Compounds in Drinking WaterSupplement III

August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov

EPA 524.3 Measurement of Purgeable Organic 

Compounds in Water by Capillary Column Gas Chromatorgraphy/Mass Spectrometry

June 2009 EPA 815-B-09-009 http://www.epa.gov/safew

Contact information for methods that are not available on the Internet are summarized in the rep

of Approved Analytical Methods for National Drinking Water Regulations."

Revised June 2011 Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations